Cleaning tool and hands immediately with water are also general rules and knowledge.
If you don’t clean your tools you need to buy new ones and on hands, well you have to brush
your skin very hard to get dry paint off.

This is all common sense but needs to be repeated in technical data sheets and MSDS.

When the particles are mixed with the paint components they don’t exist as free floating nanoparticles any more. They become permanent part of a larger structure, even in the liquid form.

It is impossible to separate the particles from the paint components just by adding water
and wash them out. If someone believes this is possible, I recommend going directly to the US patent office.
It is not that simple to create nano-particles because the strong van-der-Waals forces will keep them attached to one or the other surface and prevent them from being released into the air or skin due to they became too heavy or to big.

Silver is widely used to prevent scumming water storage tanks. It is used to sterilize water aboard NASA’s Space Shuttle program. Many airlines companies routinely use colloidal silver for in-flight water purification.

Colloidal silver is not listed as a toxin by the Environmental Protection Agency’s Poison Control Center. Likewise, the Food and Drug Administration has no regulations regarding the use of colloidal silver as an antibacterial in any form or method.

The only known toxic side effect resulting from a build-up of silver in the bloodstream is known as “Argyria;” a bluish-grey discoloration of the skin. Medical science recognizes Argyria as specifically caused by intensive long-term exposure to silver compounds, such as silver nitrate, silver sulfate, silver sulfadiazine, etc., not from micro-particles of silver.

To date, no medical study conducted on colloidal silver has indicated that it poses a threat to human health but i can find 1000s of case studies about superbugs killing people.